<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body{
            background-color:pink;
        }
    </style>
</head>
<body>
    <div>
        <h1>欢迎登录</h1>
        <form action="login" method="post">
            用户名称：<input type="text" name="username" >
            <br>
            用户密码：<input type="password" name="password">
            <br>
            <input type="submit" value="login">
        </form>
    </div>
</body>
</html>